LOS ANGELES — Our four-part series of March 2018 ratings recaps begins with an overview of all-news properties.

The following scoreboards reflect data from all-news stations that appeared in the top 20 (6+) in March 2018, a ratings period that covered March 1- 28.

Nielsen Audio only releases audience estimates for facilities that subscribe to its services. As a result, ratings stats in this exclusive analysis are limited to stations that pay Nielsen Audio for its data.

All but four stations listed here are owned by Entercom. The exceptions are WBZ-AM, Boston and KFBK, Sacramento (both iHeartMedia); WTOP, Washington, DC (Hubbard); and KOMO, Seattle (Sinclair Broadcast Group).

While the vast majority of stations on this particular panel program news around-the-clock, a few run talk blocks (in addition to their news commitment), making them genuine news – talk hybrids.

Appearing in the Baltimore report, Bloomberg-operated WDCH airs a business news format.

Up next: A look at March 2018 results for public news/talk outlets; email managing editor Mike Kinosian atKinosian@TALKERS.com